With his fiery red -- rock star smile and Vegas hotel room -- prince Kerrey's reputation is more party prince then concern diplomat. But all that changed this week and as the lovable prince winds down his week long American tour ABC's Bob Woodruff was on hand to see Harry undergo. A royal transformation. Far away from Britain France learned a bit about American baseball here in New York. Playing T ball with the kids of Harlem. It. Although his game looked a little more like cricket and baseball. He was clearly loved. In New Jersey Harry was also treated as a rock star. Governor Chris Christie shared his signature fleece -- they toured the neighborhoods badly damaged in hurricane standing at the boardwalk in seaside heights. The roller coaster that had washed into the sea. Finally came down. Its replacement will be called the superstore -- very -- America's. Together and on the sixth day of his US tour there were emotional times and cute ones as well. When he won the stuffed elephant for eleven year old Taylor -- problem she was named -- -- -- one reason the prince came here was because of an American he met serving in Afghanistan. Lost his home to sandy. In these neighborhoods that people here -- are happy to see him. -- about -- being there. Hey anything -- last draw little more attention focused on -- -- what happens is people coming gulf but. Things don't you know take time on on the local level this has been extremely successful trip the Prince -- shown a lot of emotion and maturity. And many of the people here wondering if perhaps instead big scandal broke out Las Vegas last year maybe he's changed a little. That certainly was a major naked embarrassment. Photographed by a cell phone with some woman having a lot of fun Harry's go to certain amount maturity of but it's counted the -- by the out. Nick doesn't change its -- -- -- how -- we just see different sides of -- different times. And when the cameras on him and -- the press is here today he behaves himself and his security. This time use on serious ground advocating for the -- is closest to him from Arlington where the Walter Reed. The warrior games in Colorado Springs residents -- -- On this trip he has kept its serious and clean his image is clearly on the rise. For Nightline I'm Bob Woodruff in New York.

This transcript has been automatically generated and may not be 100% accurate.